Proceedings of the Materials Research Society of Korea Conference (한국재료학회:학술대회논문집)

Materials Research Society of Korea (한국재료학회)
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Effect of $Al_2O_3$ coating on the surface of $LiCoO_2$ for the cathode of lithium ion battery

$Al_2O_3$로 코팅된 $LiCoO_2$ 입자로 제조된 리튬 이온 전지의 특성에 대한 연구

  • 오승석 (고려대학교 재료공학과) ;
  • 변동진 (고려대학교 재료공학과) ;
  • 이중기 (한국과학기술연구원 나노환경연구센터) ;
  • 조병원 (한국과학기술연구원 나노환경연구센터)
  • Published : 2003.11.01
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Abstract

The Commercial LiCoO$_2$ particles, which were 7.7${\mu}{\textrm}{m}$ in average diameter, were coated with $Al_2$O$_3$ by a gas suspension spray coating method. The coating amount of $Al_2$O$_3$ on the surface of LiCoO$_2$ was varied from 0.1 to 2 wt.% and compared their electrochemical characteristics with those of bare LiCoO$_2$. $Al_2$O$_3$ coating on the surface of LiCoO$_2$ increased surface area and electrical conductivity, and showed the better cycle and thermal stability even at the higher voltage. The observed optimum A1$_2$O$_3$ coating amount that exhibited the highest capacity retention was 0.2 wt.%.

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